JP2016044944A - Ventilation system including human detection means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation system including human detection means which improves air quality of a room while nobody is in the room by increasing a ventilation air amount at absent time by determining whether or not a person is present in the room.SOLUTION: A ventilation system which performs ventilation of an indoor space by supplying the air taken in from the outdoors to the indoor space includes: human detection means 13 for detecting presence/absence of a person 14 in the indoor space; outdoor air quality measurement means 11 for measuring a physical property value of the outside air; and indoor air quality measurement means 12 for measuring a physical property value of the indoor air. When the person 14 is determined to be absent by the human detection means 13, ventilation is executed by an absent time ventilation large air amount mode in which a ventilation amount is set to be larger than the air amount of a normal ventilation mode during normal time, and according to the measurement result measured by each air quality measurement means, the absent time ventilation large air amount mode is terminated, and the mode is switched to the normal ventilation mode.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ventilation system provided with human detection means.

  For example, the configuration of a ventilation system provided with human detection means has the following configuration.

  That is, ventilation means for ventilating the room, human detection means for detecting whether there is a person in the room, air quality detection means for detecting volatile organic compounds in the room, output of the human detection means and output of the air quality detection means It is equipped with a control means for controlling the ventilation means based on the intake and their output, and if there is a human detection output of the human detection means, the control means operates the ventilation means with or without the air quality detection means to detect the human If there is no human detection output of the means, the control operation of either operating or stopping the ventilation means is performed according to the output of the air quality detection means (for example, see Patent Document 1 below).

JP 2005-147624 A

  The problem with the above conventional example is a control method in which the ventilation means is stopped when a person is absent and the detection output of the volatile organic compound is less than or equal to the threshold value. In this method, it is possible to keep the air environment stipulated in the law, but it cannot be said to be a control method for obtaining a comfortable air quality.

  In other words, in recent highly airtight houses, in addition to volatile organic compounds, living dust and odor, and substances that pollute the air quality such as CO2 and humidity generated by the human body are likely to stay indoors. . Therefore, mechanical ventilation is performed, but if it is attempted to improve to a value equivalent to the environment of the outside air that is generally considered to be comfortable, the air volume and time required for ventilation will be considerably larger than the current situation, and the ventilation will be reduced by humans. Attempting to do so while in the room will result in an uncomfortable environment due to noise and other factors.

  Therefore, the present invention aims to improve the comfort when the room air is replaced by ventilation with a large air volume in the absence of a person and the room is returned to the room again.

  In order to achieve this object, the present invention provides a human detection means for detecting the presence or absence of a person in an indoor space in a ventilation system that ventilates the indoor space by supplying air taken from outside the room to the indoor space. And air quality measurement means for measuring physical properties of indoor and outdoor air, and when the person detection means determines that a person is absent, the setting is such that the ventilation volume is increased from the normal ventilation mode air flow. The above-mentioned purpose is achieved by performing ventilation as an unattended ventilation large air flow mode, ending the unattended ventilation large air flow mode and switching to the normal ventilation mode according to the measurement result measured by the air quality measurement means. Have achieved.

  As described above, according to the present invention, air can be exchanged in a short time without worrying about noise by performing ventilation with a large air volume in the absence of a person. Furthermore, by automatically switching from the large air volume ventilation mode to the normal ventilation mode, it becomes possible to suppress power consumption necessary for ventilation.

The sketch of the migration space where the ventilation system in the embodiment of the present invention is installed Floor plan of the bedroom where the ventilation system is installed Operation flowchart for Doujin detection automatic operation mode The figure which shows the threshold value list when switching to the ventilation large air volume mode in the absence Floor plan of the bedroom where the heat exchange system is installed Floor plan of a bedroom where a heat exchange system with the same air path switching function is installed The figure which shows the relation list of indoor outdoor temperature for the same ventilation method selection

  The ventilation system of the present invention is a ventilation system for supplying indoor air by supplying air taken from the outside to the indoor space, and a human detection means for detecting the presence or absence of a person in the indoor space; Air quality measurement unit that measures the physical properties of the air, and when the person detection means determines that no person is present, increase the ventilation volume from the normal ventilation mode and increase the ventilation volume when the person is detected. And a mode in which the absent ventilation large air volume mode is terminated and switched to the normal ventilation mode according to the measurement result measured by the air quality measurement unit. As a result, it can be determined that the person is absent, and the ventilation mode can be automatically switched according to the measurement result measured by the air quality measurement unit without performing it manually. It is canceled from, and ventilation at the optimal timing can be realized. In addition, by performing ventilation with a large air volume in the absence of a person, it is possible to realize air replacement in a short time without worrying about noise. Further, by automatically switching from the large air volume ventilation mode to the normal ventilation mode, there is an effect that it is possible to suppress power consumption necessary for ventilation.

  In addition, the air quality measurement unit includes a carbon dioxide concentration measuring means for measuring the carbon dioxide concentration. As a result, the indoor air environment is judged by reaching the set threshold value of the carbon dioxide concentration in the room, reaching the set threshold value of the difference in the carbon dioxide concentration outside the indoor room, or by the transition of the indoor carbon dioxide concentration. Since the mode can be switched, the threshold value for switching to the ventilation mode is set to a value that makes the indoor and outdoor carbon dioxide concentrations close to each other. It is possible to make it a concentration. In addition, if there is no change in the carbon dioxide concentration in the room even in the absence-ventilated large air volume mode, it is unnecessary because ventilation in the large air volume is not effective in reducing the carbon dioxide concentration in that state. It is possible to suppress excessive hyperventilation.

  In addition, the air quality measurement unit includes a temperature measurement means for measuring temperature. As a result, it is possible to judge the indoor air environment based on the temperature difference outside the room or the transition of the room temperature, and to switch the ventilation mode, so that the ventilation volume is not impaired without sacrificing not only the air quality but also the comfort due to the temperature. There is an effect that it is possible to adjust.

  In addition, the air quality measurement unit includes a humidity measurement unit that measures humidity. As a result, it is possible to judge the indoor air environment based on the humidity difference outside the room or the transition of the room humidity, and to switch the ventilation mode. For example, during the rainy season or rainy weather, the outside air is in an uncomfortable state with high humidity There is an effect that adjustment such as not increasing the ventilation amount becomes possible.

  In addition, the air quality measurement unit includes a dust concentration measuring unit that measures the dust concentration. As a result, it is possible to judge the indoor air environment based on the dust concentration difference outside the room or the transition of the indoor dust concentration, and to switch the ventilation mode. For example, when there is a lot of pollen and the amount of traffic In a state where a lot of dust is contained in the air, there is an effect that adjustment such as not increasing the ventilation amount becomes possible.

  In addition, the air quality measurement unit includes an odor concentration measuring unit that measures odor intensity. As a result, it is possible to judge the indoor air environment from the indoor odor intensity or the transition of the indoor odor intensity, and to switch the ventilation mode, for example, when there is an event that generates odors outdoors, for example Has an effect that adjustment such as not increasing the ventilation path hot water becomes possible.

  In addition, the air quality measurement unit is configured by a combination of various air quality measurement units. This makes it possible to determine the indoor air environment based on the difference in carbon dioxide concentration, temperature, humidity, dust concentration, odor level outside the room or the transition of carbon dioxide concentration, temperature, humidity, dust concentration, odor level inside the room, and ventilation. Since the mode can be switched, various outdoor conditions can be detected, and adjustments such as not increasing the ventilation volume in outside air conditions that exceed the threshold in carbon dioxide concentration, temperature, humidity, dust concentration, odor level, etc. There is an effect that it becomes possible.

  Moreover, it has the structure provided with the heat exchange ventilation operation | movement which performs heat exchange of the air taken in indoors from the outdoors, and the air discharged | emitted from the indoors outdoors. As a result, when the air is discharged from the room to the outside, the amount of heat used for air conditioning in the room is not exhausted as it is, but the amount of heat can be returned to the room air, so the outdoor is not a comfortable temperature environment. Even in this case, it is possible to take in air having a temperature close to the indoor environment. In addition, there is an effect that it is possible to reduce the air conditioning load.

In addition, the heat exchange ventilation operation and the direct ventilation operation for directly supplying the air taken from outside into the room are provided, and the ventilation amount in each operation is set according to the measurement result in the air quality measurement unit. . This makes it possible to switch between the heat exchange ventilation operation and the direct ventilation operation depending on the temperature and humidity outside the room, so that heat energy can be used effectively, and heat loss occurs due to unnecessary heat exchange. It is possible to prevent such a situation. In addition, when heat exchange is not required, direct ventilation operation allows ventilation in a low-pressure-damaged air passage that does not go through a heat exchange section with high pressure loss, thus making it possible to save energy in blast energy. There is an effect.

Moreover, it has the structure that the user can set beforehand the physical property value of the air at the time of switching to the said normal ventilation mode from the said ventilation large air volume mode at the time of absence. Thereby, since the ventilation mode can be switched at a threshold required by the user, it is possible to set a preferable setting depending on the season and time zone.

  In addition, for users with hay fever and users who live along the main roads that have different traffic volumes depending on the time of day, users who do not want a particular environmental condition should use settings that are specific to that factor. There is an effect that becomes possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a sketch of a migration space where a ventilation system according to an embodiment of the present invention is installed, and FIG. 2 is a sketch of a bedroom 7 as an example of a room. In FIG. 1, a living space 1 is partitioned into a living room 2, a bathroom 3, a dressing room 4, a toilet 5, a study 6, a bedroom 7, a children's room 8, and the like. An air supply means 9 for supplying air to the air and an exhaust means 10 for discharging indoor air to the outdoors are provided.

  In FIG. 2, the air supply means 9 and the exhaust means 10 are provided with an outdoor air quality measuring means 11 and an indoor air quality measuring means 12, respectively. Further, a person detection means 13 is also provided in the room, and detects whether or not a person 14 is in the room.

  The human detection means 13 here is, for example, an infrared sensor that detects a person's movement and outputs a voltage of DC5V when the presence of the room is detected, and outputs 0V when it is absent. As long as the absence of a person can be detected, there is no problem even if another method is adopted, and there is no difference in operational effects.

  The air supply means 9, the exhaust means 10, the outdoor air quality measurement means 11, the indoor air quality measurement means 12, and the human detection means 13 are connected to a control means 15, and a remote controller 16 connected to the control means 15. Thus, the operation instruction and setting change of the air supply means 9 and the exhaust means 10 can be performed.

  A plurality of operation modes are provided, and a mode in which the ventilation operation set by the remote controller 16 is continuously executed irrespective of the outdoor air quality measurement means 11, the indoor air quality measurement means 12, and the human detection means 13 is a manual operation mode. A mode for automatically switching the operation mode by the outdoor air quality measuring means 11 and the indoor air quality measuring means 12 is an air quality detection automatic operation mode, and the outdoor air quality measuring means 11, the indoor air quality measuring means 12 and the human detection means 13 are used. The mode in which the operation mode is automatically switched depending on whether or not the person 14 is in the room is referred to as a human detection automatic operation mode. Here, only the manual operation mode and the human detection automatic operation mode will be described, and description of other operation modes will be omitted.

  When a manual operation mode is set by the remote controller 16 and an operation instruction is given, the control means 15 continuously operates the air supply means 9 and the exhaust means 10 so that ventilation is performed with the set air volume, and a stop instruction is issued. When the air is discharged, the air supply means 9 and the exhaust means 10 are stopped.

  FIG. 3 shows an operation when the human detection automatic operation mode is set by the remote controller 16 and a driving instruction is given. When the person detection automatic operation mode is set, the person detection means 13 detects whether or not a person 14 is present in the room. At this time, if the room is in the room, the normal ventilation mode is set, and the ventilation air volume is set to the normal time. Further, when the person detecting means 13 detects the presence of the room, it is normal if the relation between the values is less than the threshold value based on the relation between the measured values of the outdoor air quality measuring means 11 and the indoor air quality measuring means 12. Operate in the ventilation mode. If the value exceeds the threshold value, switch to the absent ventilation large air volume mode and operate with the ventilation air volume increased. This control operation is repeated, and when the relationship between the measurement values of the outdoor air quality measurement unit 11 and the indoor air quality measurement unit 12 is less than the threshold value, the mode is switched to the normal ventilation mode. Thereafter, the ventilation operation is stopped when the timer time t set in the remote controller 16 connected to the control means 15 elapses or when the remote controller 16 instructs to stop.

  In addition, in the absence ventilation large air volume mode, when the person is absent, the purpose is to ventilate with a large air volume without worrying about noise, and to replace the air with an environment equivalent to the outside air in a short time. Control may be made to switch to the absent ventilation large air volume mode after elapse of a certain time (for example, 5 minutes) after the absence of the room is detected by the means 13.

In addition, the normal ventilation in the present embodiment is about the air volume (20m ³ / h per person) determined as the required ventilation volume in the Building Standard Law, whereas the air volume in the large air volume mode is the lowest However, it should be set at an air volume that is twice the normal ventilation.

  Next, the concept of the threshold value for switching to the absent ventilation large air volume mode will be described.

FIG. 4 shows the relationship between the measured values of the outdoor air quality measuring means 11 and the indoor air quality measuring means 12 when switching to the absent ventilation large air volume mode. Here, as air quality measurement means, CO2 concentration measurement means for measuring CO2 concentration (ppm), temperature measurement means for measuring temperature (° C.), humidity measurement means for measuring relative humidity (%), dust concentration (mg / The threshold value in each of the dust concentration measuring means for measuring m ³ ) and the odor intensity measuring means for measuring odor intensity is shown. When the difference between the measured values on the indoor side and the outdoor side exceeds the threshold value shown in FIG. 4, it can be seen that the indoor air is in a state of being contaminated with exhaled breath or domestic dust. In other words, the indoor air can be improved to a comfortable environment similar to the outside air by continuing the operation in which the ventilation air volume is increased until reaching a value that does not satisfy the threshold value. However, depending on the environment, it can be considered that the outside air is not preferable. For example, the outdoor dust concentration in the season when there is a lot of pollen, and the outdoor relative humidity during rainy season or rainy weather fall under this category. In such an outside air environment, a threshold is set so that ventilation with increased ventilation airflow is not performed.

  In the present embodiment, the air supply means 9 and the exhaust means 10 have been described as a structure provided with a blower means installed on the wall surface, but this is not necessarily the case, and the air supply means 9 or the exhaust means 10 If either one is provided with a ventilation means capable of mechanically blowing air, the other is not provided with a ventilation means, and a structure such as a so-called natural air supply port or natural exhaust port has sufficient ventilation. There is no problem if it can be done, and there is no difference in the effect.

  In the present embodiment, the air supply means 9 and the exhaust means 10 have been described as being installed in each room. However, this is not necessarily the case, and the air supply means 9 and the exhaust means 10 in each room are not outdoor. If the control means 15 to which the air quality measurement means 11, the indoor air quality measurement means 12, the human detection means 13 and the like are all connected is connected to the remote control 16 in each room, it is possible to provide sufficient ventilation. There is no difference. Furthermore, it becomes possible to cope with ventilation air volume management as a whole room.

(Embodiment 2)
FIG. 5 shows a sketch in the bedroom 7 in which the heat exchange air system 17 having the function of the heat exchange air operation is installed. The ventilation system in the present embodiment is basically the same as the ventilation system in the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

  The heat exchange air system 17 is provided with an air supply means 9 for supplying air taken from outside to the indoor space, and an exhaust means 10 for discharging indoor air to the outdoors. The air supply means 9 and the exhaust means 10 are provided with an outdoor air quality measurement means 11 and an indoor air quality measurement means 12 respectively. Moreover, the person detection means 13 is also provided and detects whether the person 14 is occupying the room. The air supply means 9, the exhaust means 10, the outdoor air quality measurement means 11, the indoor air quality measurement means 12, and the human detection means 13 are connected to a control means 15, and a remote controller 16 connected to the control means 15. Thus, the operation instruction and setting change of the air supply means 9 and the exhaust means 10 can be performed. In addition, a heat exchange element 18 is provided at the intersection of the air supply path and the exhaust path in the heat exchange air system 17, and heat can be exchanged in the air passing through each path. In other words, if normal ventilation is performed in a state where the room is cooled by an air conditioner or the like in the summer, heat is lost because the indoor air is exhausted and high temperature outdoor air is supplied. When heat exchange air operation is performed through the element 18, heat exchange is performed between the cooling air on the exhaust side and the high-temperature air on the air supply side, so that air having a temperature lower than the outside air can be supplied indoors. Energy saving and improved comfort can be realized.

  Further, as shown in FIG. 6, the air flow path in the heat exchange air system 17 may be configured such that the heat exchange air flow path 20 and the direct ventilation air path 21 can be switched by the air path switching means 19. With such a configuration, heat exchange is performed according to the relationship between the outside air temperature measured by the outdoor air quality measuring unit 11, the indoor air temperature measured by the indoor air quality measuring unit 12, and the set temperature T set by the remote controller 16. It is judged whether to operate in the air ventilation path 20 or directly in the ventilation air path 21, and a ventilation operation for realizing energy saving is performed. FIG. 7 shows combinations of temperatures and ventilation methods at that time.

  Here, to determine the operation in the heat exchange air duct 20 means that the indoor air temperature is seasonally preferable to the outside air (the summer is cooler and the winter is warmer). In other words, large air volume ventilation is desirable from the viewpoint of air quality improvement such as exhausting pollutants, but it is desirable to keep the ventilation volume to a normal state from the viewpoint of comfortable temperature. Therefore, even in the condition for switching to the human detection operation mode, if the relationship between the outside air temperature and the room temperature at that time is a condition for operation through the heat exchange air duct 20, the operation is performed with a normal ventilation amount. Shall.

As mentioned above, the ventilation system provided with the human detection means of the present invention is
The ventilation mode can be automatically switched without manual operation according to the measurement result measured by the air quality measurement means, and it is eliminated from the trouble of switching the mode manually. Ventilation at the optimal timing can be realized. In addition, by performing ventilation with a large air volume in the absence of a person, it is possible to realize air replacement in a short time without worrying about noise. Furthermore, by automatically switching from the large air volume ventilation mode to the normal ventilation mode, it becomes possible to suppress power consumption necessary for ventilation.

  Therefore, for example, it is expected to be used not only for general housing but also for industrial ventilation equipment.

DESCRIPTION OF SYMBOLS 1 Living space 2 Living 3 Bathroom 4 Dressing room 5 Toilet 6 Study 7 Bedroom 8 Child room 9 Air supply means 10 Exhaust means 11 Outdoor air quality measurement means 12 Indoor air quality measurement means 13 Person detection means 14 Person 15 Control means 16 Remote control 17 Heat exchange air system 18 Heat exchange element 19 Air passage switching means 20 Heat exchange air air passage 21 Direct ventilation air passage

Claims (10)

In a ventilation system that ventilates an indoor space by supplying air taken from the outside into the indoor space, human detection means for detecting the presence or absence of a person in the indoor space, and the physical property values of the indoor and outdoor air are measured. An air quality measurement unit, and when the person detection means determines that a person is absent, the air quality measurement unit is provided with an unattended large air flow mode for increasing ventilation volume from the normal ventilation mode and performing ventilation. A ventilation system configured to end the absent ventilation large air volume mode and switch to the normal ventilation mode according to the measurement result measured by the measurement unit. The ventilation system according to claim 1, wherein the air quality measurement unit includes a carbon dioxide concentration measuring means for measuring a carbon dioxide concentration. The ventilation system according to claim 1 or 2, wherein the air quality measurement unit includes temperature measurement means for measuring temperature. The ventilation system according to any one of claims 1 to 3, wherein the air quality measurement unit includes a humidity measurement unit that measures humidity. The ventilation system according to any one of claims 1 to 4, wherein the air quality measurement unit includes a dust concentration measurement unit that measures a dust concentration. The ventilation system according to any one of claims 1 to 5, wherein the air quality measurement unit includes odor concentration measurement means for measuring odor intensity. The ventilation system according to any one of claims 1 to 6, wherein the air quality measurement unit is configured by a combination of various air quality measurement means. The ventilation system according to any one of claims 1 to 7, further comprising a heat exchange ventilation operation for exchanging heat between air taken into the room from outside and air discharged outside from the room. 9. The heat exchange ventilation operation and a direct ventilation operation in which air taken from outside is directly supplied into the room, and a ventilation amount in each operation is set according to a measurement result in the air quality measurement unit. The ventilation system described in. The ventilation system according to any one of claims 1 to 9, wherein a user can set in advance a physical property value of air when switching from the absent ventilation large air volume mode to the normal ventilation mode. .

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